Bug Description

On the trusty installer desktop, double-tap drag works to reposition a window, but upon lifting the finger the drag halts immediately. This is very inconvenient when the user wants to drag a window further than the distance available on the trackpad. On Synaptic devices locked drags can be enabled with options "Synaptics Locked Drags" and "LockedDragTimeout". Another solution would be so switch to triple touch drags for repositioning (like OS X), this is preferable as there is only a single gesture, so the user's intent is always clear, and the drag will never timeout inadvertently.